Hundreds of Border Patrol agents filled part of the baseball stadium in a sea of olive green. A line of riflemen stood at attention as the American flag and the agency's own flag fluttered in the cool morning air.

In recent weeks, more than 31 million gallons of sewage have spilled across Playas de Tijuana, just south of the border from San Diego. The impact is being felt in both countries. But the damaging delay by Mexican authorities before moving to stop the spill could be an opportunity to improve communication on environmental emergencies.

Sergio is a 21-year-old college student in San Diego, majoring in business administration. He is openly gay and undocumented, having crossed the border illegally from Mexico with his family when he was 2.

Those who knew the judge say he died working for the betterment of a major border district. He'd gone to see Congresswoman Gabrielle Giffords to say hi. And to talk about his plans for the future of the busiest immigration corridor along the border.